3(-r-1)=4

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Solution for 3(-r-1)=4 equation:


Simplifying
3(-1r + -1) = 4

Reorder the terms:
3(-1 + -1r) = 4
(-1 * 3 + -1r * 3) = 4
(-3 + -3r) = 4

Solving
-3 + -3r = 4

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '3' to each side of the equation.
-3 + 3 + -3r = 4 + 3

Combine like terms: -3 + 3 = 0
0 + -3r = 4 + 3
-3r = 4 + 3

Combine like terms: 4 + 3 = 7
-3r = 7

Divide each side by '-3'.
r = -2.333333333

Simplifying
r = -2.333333333

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